openGauss每日一练第5天 - 学习心得体会

1.创建数据库musicdb10，创建用户user10，赋予sysadmin权限

连接到数据库

root@modb:~# su - omm
omm@modb:~$ gsql -r
gsql ((openGauss 3.0.0 build 02c14696) compiled at 2022-04-01 18:12:00 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

创建表空间及数据库，用户及授权

omm=# create tablespace musci_tbs relative location 'tablespace/test_ts1';
CREATE TABLESPACE
omm=# 
omm=# CREATE DATABASE musicdb10 WITH TABLESPACE = music_tbs;
ERROR:  tablespace "music_tbs" does not exist
omm=# 
omm=# CREATE DATABASE musicdb10 WITH TABLESPACE = musci_tbs;
CREATE DATABASE
omm=# create user user10 identified by 'kunpeng@1234';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# alter user user10 SYSADMIN;
ALTER ROLE

2.用户user10访问数据库postgres，创建一个表并插入数据

omm=> \c postgres user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "postgres" as user "user10".
openGauss=> 
openGauss=>   create table tb12(col1 char(20));
openGauss=> CREATE TABLE
 insert into tb12 values('Hello openGauss! 10');
INSERT 0 1
openGauss=>  select * from tb12;
         col1         
----------------------
 Hello openGauss! 10 
(1 row)

openGauss=> \dt
openGauss=>                          List of relations
 Schema | Name | Type  | Owner  |             Storage              
--------+------+-------+--------+----------------------------------
 public | tb12 | table | user10 | {orientation=row,compression=no}
(1 row)

3.用户user10访问数据库omm，创建一个表并插入数据

musicdb10=> \c omm user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "omm" as user "user10".
omm=> 
omm=>  create table tb11(col1 char(20));
CREATE TABLE
omm=>  insert into tb11 values('Hello openGauss! 10');
INSERT 0 1
omm=>  select * from tb11;
         col1         
----------------------
 Hello openGauss! 10 
(1 row)

4.用户user10访问数据库musicdb10，创建一个表并插入数据

omm=# \c muscidb10 user10
Password for user user10: 
FATAL:  database "muscidb10" does not exist
Previous connection kept
omm=# 
omm=# \c musicdb10 user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "musicdb10" as user "user10".
musicdb10=>  create table tb10(col1 char(20));
musicdb10=> CREATE TABLE
 insert into tb10 values('Hello openGauss! 10');
INSERT 0 1
musicdb10=>  select * from tb10;
         col1         
----------------------
 Hello openGauss! 10 
(1 row)